Played about 3 hours of this game this afternoon. Like
ThatGamingDude
said, it's less Necrodancer and more Zelda. It definitely feels like a rogue-like Zelda game more than anything else, and you can even (more or less) get rid of the entire Necrodancer mechanics completely by turning on a setting in the gameplay options that makes the enemies move when you do and turns the game into a more traditional rogue-like.
That being said, the RNG in this game has been pretty brutal I feel. There are some items you obtain that are permanent, but some items have durability and (most) items you lose completely when you die. There are a few spots I've found in the over world map that have chests that contain the same items every time, but others are just totally random. Dungeon bosses seems incredibly difficult without having good power-ups that are obtained at random and can break half-way through the fight. This seems like a huge problem early on in the game where you only have 3 hearts and no good equipment which makes it pretty easy to die. I spent the better part of an hour just getting used to the controls and the enemy movements in the first area as well as trying to gather up heart pieces to permanently increase my health.
It seems that there are four dungeons + one final dungeon. There are tons(!) of underground areas with secrets to unlock, although treasure ranges from good (permanent items) to not so good (rupees, which you lose if you die).
It's a fun game though, highly recommended for Zelda fans or if you're in the mood for a decent rogue-like and/or rhythm game.